Roller-mill



(No Model.) I 2 SheetsSheet 1.

C. F. WALTERS 8; P. SHELLENBAGK.

ROLLER MILL.

No. 421,996. Patented Feb. 25, 1 890.

m FXKJ N PEYERs. Phmminw m hm. Wushinglon, D. c.

(No Model.) 2 Sheets- Sheet 2..

,G. P. WALTERS & P. SHELLENBAOK.

ROLLER MILL.

No. 421,996. Patented Feb. 25, 1890.

mm Llllw mphcr, Washmgham D C UN TED STATES PATENT OFFICE.

CHARLES F. \VALTERS AND PETER SHELLENBAOK, OF RICHMOND, INDIANA.

ROLLER-MILL.

SPECIFICATION forming part of Letters Patent No. 421,996, dated February25, 1890.

' Application filed August 9, 1889. Serial No. 320,287. (No model.)

To all whom it may concern.-

Be it known that we, CHAR-LES F. WALTERS and PETER SHELLENBAOK, both ofRichmond, in the county of Wayne and State of Indiana, have inventedcertain new and useful Improvements in Roller-Mills; and we do herebydeclare the following to be afull, clear, and exact description of thesame, reference being had to the accompanying drawings, forming apart ofthis specification, and to the figures of reference marked thereon.

0 ur present invention relates to roller-mills, and particularly to themeans for supporting and providing for the necessary adjustments of thegrinding rolls, whereby construction of the parts is not only simplifiedand cheapened, but the adjustments can be very easily made; and to theseends the invention consists in certain novelties of construction andcombinations of parts, all as will be hereinafter fully described, andthe novel features pointed out in the claims at the end of thespecification.

In the drawings, Figure 1 is a side view of a roller-mill constructed inaccordance with our invention, with the hopper and feeding devicesremoved; Fig.2, an end view; Fig. 3, a section on the line as m, Fig. 1;Fig. 4, a side View of a modification; Fig. 5, a view of a modified formof movable roll-adjusting device.

Similar figures of reference in the several figures indicate similarparts.

In the drawings, 1 represents the body or casing of the mill; 2 2, thestationary or nonyielding rolls, and 3 3 the movable or yielding rolls.The rolls 2 2 are mounted in boxes 1 i on the ends of spring-arms 5 5,bolted to the side of the casing at 6 and preferably formed of castmetal and in the shape indicated in Fig. 1that is, with webs-=for thepurpose of strengthening them. We have found that even these arms formedof cast metal, when the point of fastening to the easing or support issufficiently removed from the roll, will give sufficient elasticity topermit a slight movement and thus serve to take ing-screws 9, restingupon the lugs, as shown.

It will be seen that the tendency of the springarms being to depress theroller bearings the screws will be kept in contact with the lugs and anyadj ustinent can be given theroll, the spring moving it in one directionand the screw in the other. \Vhile the spring-arms 5 are, in the presentinstance, formed in a single piece, and in practice we prefer thisconstruction, it is obvious that they could be made separate and securedin any desired manner to the casing.

The adjustable or yielding rolls 3 3 are so 65. cured in boxes 11 11,formed in the ends of spring-arms 12 12, preferably similar to arms 5,and bent "in loop shape and secured to the casing by bolts 13 13, asshown. The ends of these arms are preferably slotted, as in Fig. 3, forthe passage of an adjusting and spreading lever, and the ends on whichthe rolls are mounted are arranged to carry the said rolls parallel withthe stationary rolls.

For the purpose of adjusting the yielding rolls accurately, andpermitting the separation of the rolls for the passage of foreignsubstances, and also to provide means for spreading them, we pivot uponthe frame'levers 15, formed of cast metal in a manner similar to 5 and12, and like them permitted a slight springing action. The pivotal pointof each of the levers in the construction in Fig. 1 is just beyond theend of the point of fastening of arm 12, and it is bent downward andupward, forming a springdoop, and the upper end is provided with a yokeor perforation through which passes a bolt or rod 16, connected at itsinner end to the arm 12, preferably near the roller 3, while its outerend 0 is threaded and upon it is screwed an adjustable hand-wheel 17,bearingagainst the lever 15, said wheel and bolt constituting anadjustable connection between the lever and arm 12, carrying theyielding roll 3, through which the pressure of the resilient lever istransmitted to and exerted against the resilient arm 12, and operates toforce the latter to one side and hold the roll 3 in operative relationto the other roll 2 while grind- 10o ing, at the same time permits theseparation of the rolls when a foreign body is carried between them, andeffects their return to normal working position upon the removal orexpulsion of said body. The position of the arm 12 is such that whenrelieved from pressure it will stand with its roll 3 held separated fromthe roll 2 and out of working position, and the pressure of theresilient lever 15 is exerted against the arm 12 to draw or force thelatter in adirection to cause the approach of the rolls. The lever 15 isengaged by a cam 18, or equivalent device, to sustain it in.

operative position-that is to say, under tension and exerting pressureupon the arm 12 and permit of an instantaneous release of the lever anda relaxation of pressure, so that the yielding roll may be drawn orforced back by the springing of its supporting-arm 12. The several camsor equivalent relief devices are preferably mounted upon a through-shaft19, journaled in the casing, and may be operated by a hand-lever orother devices to cause the advance or retraction of all the levers 15.

The operation of the devices thus far described will be obvious. Thespring-arms carrying the non-yielding roll are separately adj usted tobring the rolls parallel or in train by means of the set-screws orequivalent devicesen gaging said arms. The yielding roll, mounted uponthe resilient arms 12, is drawn or forced toward the non-yieldin g rolland held in working position by the action of the levers 15, the latterbeing retracted by the cams and exerting pressure upon the arms 12through the adjustable connections. By moving the cams so as to allowthe levers to be retracted the pressure upon. the arms 12 is relieved,and the latter are permitted to spring back, carrying the roll Withthem.

In Fig. 4 we have shown a modification. in which the inner rolls arestationary,the arms 5 5 being somewhat shorter, though sufficiently longto give the slight spring necessary for the small vertical adjustment,and they are also capable of a slight lateral adjustment, setscrews 20,passing through lugs 21 in the'cas ing, serving to adjust them outwardslightly, if desired. The outer rolls in this instance are yielding andadjustable, being mounted in boxes on the ends of spring-arms 50,similar to those in which the stationary or nonyielding rolls aremounted, but connected or formed in. one piece instead of on separatecastings, as in Fig. 1,though it will be understood that theseconstructions are regarded as equivalents. The tendency of the arms 50is, as before,to separate the rolls, and the necessary adjustments arehad'by means of adjusting-screws 25, provided with hand-wheels 27 andpassing through the levers 28, and abutting against the rear side ofarms 12. These levers 28 are pivoted at 29 to the casing, and theirinner proximate ends lap and are slotted for the accommodation of a pinor pins 30 on the end of a dependinglink 31, connected by a crank. witha shaft preferably passing from side to side of the machine, andprovided with a handle 34 for operating it, said connections beingadapted, when the shaft 33 is turned, to lift the inner ends of thelever may be desired.

and permit the spring-arms 12 to cause the separation of the rolls.

It will be understood that the spring-arms, adj Listing-screws, levers,&c., are the same on both sides of the machine, and also that instead ofthe cams in Fig. 1 and the links in Fig. 4 any ordinary or preferredform of devicemaybe employed for operating the spreading-levers.

While we have shown our invention as embodied in a double mill, we donot desire to be confined to this form as a single pair of rolls couldas well be used and our improvements embodied therein.

In Fig. 5 is shown a modified form of rolladjusting device applicable tothe yielding roll. In this construction the lever 36 is not aself-springing one, but is pivoted to the casing at 37, its inner endextending to a spreading cam, as shown, for instance, in Fig. 1, whileits outer portion is formed with an upper extension 38 and a lowerextension 39, the lower. extension being provided with a perforation andguiding-ears 40 on the inner side, and the upper extension with ase riesof recesses 41.

As a means for providing for the attach ment of the rod 16, connected tothe movable roll, and of affording some spring between the lever androll, we provide a lever 42, hav ing a pivotal lug or projection 47,entering one of the recesses 41 and slot-ted at topand bottom, as shown,the lower end of the lever being connected to the lower lever-extension39 by a bolt 43 passin gth rough the slot in the lower end, a spring 44being interposed be tween the head of the bolt or a plate thereon andthe end of lever 36. A nut 45 on the outer end of the bolt bearing onthe lever 42 serves to adjust the tension of the spring as The rod 16passesthrough the upper end of lever 42 and the handwheel 17 operates011 the outer side to regulate the yielding roll, as before. By adjListing the lug 47 in one or the other of the res cesses 41 the movementof the lever and pressure of the rolls can be regulated as de sired.

The employment of springs to regulate the horizontal as well as thevertical adjustments of the rolls simplifies. the construction andfacilitates quick adjustment.

In using the terms adjustable or yielding roll in the claims we refer tothe one that is moved to spread the rolls and the one which yields topermit the passage of a for- 1. In a roller-mill, the combination, withthe casing or support, the spring-arms secured at one end thereto havingthe bearings, and the adjustable or yielding roll mounted in saidbearings, the tendency of the springarrns being to separate the rolls,of the stationary or non-yielding roll, the spring-arms secured to thecasing on which it is mounted, and adjusting devices, such as screws,operating to adjust said roll against the tension of the spring-arms ina plane at right angles to the plane 'of the rolls, substantially asdescribed.

52. In a roller-mill, the combination, with the casing or support, thespring-arm having bearings at opposite ends and secured at the center tothe casing or support, and the stationary or non-yielding rolls mountedin said bearings, of the adjustable or yielding rolls movable toward andfrom the first-mentioned rolls, substantially, as described.

3. In a rollernnill, the combination, with the casing or support, thespring-arms having bearings in opposite ends and fastened at theircenters to the casing or support, and the stationary or non-yieldingrolls mounted in said bearings, of the spring-arms fastened at theircenters to the casing or support and having bearings in the ends,'theadjustable or yielding rolls mounted in said bearings, and devices,substantially as described, for adjusting said rolls toward the fixedrolls against the tension of the spring arrns, substantially asdescribed.

at. In a roller-mill, the combination of the casing or support, thestationary or nonyielding'roll, the spring-arms fastened to the casingand having the bearings, the adjustable or yielding roll mounted in saidbearings, the spreadingdever and adjustable connection between it andthe spring-arm supporting the adjustable or yielding roll, and thespring interposed in said connection, substantially as described.

5. In a roller-mill, the cornbinationof the casing or support, thestationary or nonyielding roll, the spring-arms fastened to the casingand having the bearings, the adjustable or yielding roll mounted in saidbearin gs, the pivoted spreading-lever formed with a spring or elasticend, the rod connected to the spring-arm supporting the adjustable oryielding roll, and the hand-wheel forming the connection between it andthe spreadinglever, substantially as described. I

6. In a roller-mill, the combination, with the rolls, of spring-armssecured to the frame and carrying the boxes for one of said rolls, saidspring-arms or a portion thereof eXtending in a plane substantiallyparallel with a plane passing through the axis of both rolls,

with adjusting devices, such as set-screws, in-

terposed between the spring-arms and a fixed portion of the frame andoperating to adjust the ends of the-roll in a direction transverse to aplane passing through the axis of both rolls, substantially asdescribed.

7. In a roller mill comprising two copperating rolls, the combination,with one of said rolls, of bearings supported upon the free ends ofspringarms, said arms being secured to the frame and extending in aplane or planes substantially parallel with a plane intersecting theaxis of both rolls, and adj ustin g devices, such as set-screws,interposed between the outer or free ends of said springarms and fixedportions of the frame, substantially as described.

CHAS. F. WALTERS. PETER SHELLENBAGK. Witnesses;

BENJ. F. HARRIS, LEWIs D. STUBBs.

